wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Chemical Spot Tests & Staining Methods

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

What is the chemical name of AlO(OH)?

a)

hydroxide oxido aluminum

b)

aluminum hydroxide

c)

aluminum oxyhydroxide

2.

Which rock/mineral does NOT contain calcium?

a)

gypsum

b)

bauxite

c)

apatite

3.

What color is produced in spot test analysis of chromium?

a)

White

b)

Purple/pink

c)

Blue

4.

Which elements may be present in the same solution?

a)

Co and Fe

b)

Cr and Fe

c)

Cu and Fe

5.

Which element has 390 ppm abundance in the Earth's crust?

a)

Barium

b)

Gold

c)

Cobalt

6.

In the test for presence of Mn, sodium bismuthate is added to the sample solution in ____.

a)

powder form

b)

20% solution

c)

both

7.

The most common form of phosphate rock is ____.

a)

brucite

b)

apatite

c)

none of the above

8.

Formation of brown and blue colors indicates presence of ____.

a)

copper

b)

iron

c)

iron and copper

9.

The test applicable for sample containing high value of molybdenum uses _____.

a)

nitric acid

b)

hydrochloric acid

c)

sulfuric acid

10.

Carbonate minerals are present in which type of rocks?

a)

sedimentary rocks

b)

igneous rocks

c)

metamorphic rocks

d)

all of the above

11.

Calcite group is a/an ____.

a)

orthorhombic system

b)

hexagonal-rhombohedral system

12.

Which of the following is used to stain carbonate minerals?

a)

sodium cobaltinitrite

b)

Alizarin Red S

13.

After staining with Alizarin Red S dye, the carbonate mineral ______ remains unstained.

a)

calcite

b)

dolomite

14.

Feldspars with Na and Ca as major elements are called _____.

a)

Potassium Feldspar

b)

Plagioclase feldspar

c)

Alkali feldspar

15.

This mineral stains lemon/bright yellow with HF and sodium cobaltinitrite.

a)

Plagioclase Feldspar

b)

K-feldspar

c)

Quartz